html,
body {
    height: 100%;
    overflow: hidden;
}

body {
    display: flex;
    align-items: center;
    justify-content: center;
}

h1 {
    font-size: 95vh;
    font-family: sans-serif;
    position: relative;
    background: white;
    color: black;
    margin: 0;
    padding: 0;
    overflow: hidden;
}
h1:before {
    content: '';
    display: block;
    position: absolute;
    -webkit-filter: blur(20px);
    filter: blur(20px);
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    mix-blend-mode: screen;
    background-image: repeating-linear-gradient(-45deg, transparent, transparent 1em, #9E2053 1em, orange 50%), repeating-linear-gradient(45deg, #111626, #111626 1em, pink 1em, #571B3D 50%);
    background-size: 3em 3em, 2em 2em;
    animation-name: ani;
    animation-duration: 8s;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    animation-direction: alternate;
}

@keyframes ani {
    from {
        background-position: 0 0;
    }
    to {
        background-position: 400% 0;
    }
}
